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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_LOADER_NETLOG_OBSERVER_H_
#define CONTENT_BROWSER_LOADER_NETLOG_OBSERVER_H_
#include <stdint.h>
#include "base/containers/hash_tables.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "content/public/common/resource_devtools_info.h"
#include "net/log/net_log.h"
namespace net {
class URLRequest;
class NetLogEntry;
} // namespace net
namespace content {
struct ResourceResponse;
// NetLogObserver watches the NetLog event stream and collects the stuff that
// may be of interest to the client. Currently, this only includes actual
// HTTP/SPDY headers sent and received over the network.
//
// As NetLogObserver shares live data with objects that live on the IO Thread,
// it must also reside on the IO Thread. Only OnAddEntry can be called from
// other threads.
class CONTENT_EXPORT NetLogObserver : public net::NetLog::ThreadSafeObserver {
typedef ResourceDevToolsInfo ResourceInfo;
public:
// net::NetLog::ThreadSafeObserver implementation:
void OnAddEntry(const net::NetLogEntry& entry) override;
// The NetLog instance is passed in via the |net_log| parameter.
static void Attach(net::NetLog* net_log);
static void Detach();
// Must be called on the IO thread. May return NULL if no observers
// are active.
static NetLogObserver* GetInstance();
static void PopulateResponseInfo(net::URLRequest*, ResourceResponse*);
private:
static NetLogObserver* instance_;
NetLogObserver();
~NetLogObserver() override;
ResourceInfo* GetResourceInfo(uint32_t id);
void OnAddURLRequestEntry(const net::NetLogEntry& entry);
typedef base::hash_map<uint32_t, scoped_refptr<ResourceInfo>>
RequestToInfoMap;
RequestToInfoMap request_to_info_;
// Used to validate that calls to the NetLogObserver methods occur on the
// thread it was instantiated on. Typically the IO thread.
static base::LazyInstance<std::unique_ptr<base::ThreadChecker>>::Leaky
io_thread_checker_;
DISALLOW_COPY_AND_ASSIGN(NetLogObserver);
};
} // namespace content
#endif // CONTENT_BROWSER_LOADER_NETLOG_OBSERVER_H_
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